Charred bean remains were excavated from the Kamizato site in Kyoto city (the late Jomon).
Yomiuri Online (June 11, 2008)
Jomon Banki ni Nohko, Mame 40 ko Shutsudo (Cultivation in the late Jomon: 40 charred beans excavated) (JAPANESE)
Kyoto Shimbun Web News (June 11, 2008)
Jomon Banki no Tsuchi kara Kome Shutsudo (Rice remains found from the layer of the late Jomon site) (JAPANESE)